Process of making envelops.



N. E. FUNK.

PROCESS OF MAKING ENVELOPS.

APPLICATION FILED NOV. 4. 1913.

]Pa;i;ented Apr. 13, 11915.

3 SHEETS-8EEET 1.

N. FUN K. PROCESS OF MAKING ENVELOPS. APPLICATION FILED NOV. 4, 1913.

Patented Apr. 13, 1915.

3 SHEETS-SHEET 3.

aperture, through which the address upon NELSON n. rune, orironrcnanagnnw annr.

rnoonss or rename m vnnore.

specification of Letters Patent.

Application filed November 1, 1913. Serial Ito. 799,222.

To all whom it may concern.-

Be it known that T, Nansen E. FUNK, a

citizen of the United States, residing at Montclair, in the county ofEssex and State of New Jersey, have invented new and useful Improvementsin Processes of Making" Envelops; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to .which it appertains to makeand use the same.

My invention consists in the novel features hereinafter described,reference being had to the accompanying drawings which illustrate themanner in which my improved process is carried out, and said inventionis fully disclosed in the following description and claims.

The object of my invention is to form envelops either with or without awindow the inclosure may beseen, and in which case forms the address ofthe envelop, by a continuous process with the least possible waste ofmaterial and in a rapid and edicient manner. The various operations uponthe materials employed for the manufacture of the envelops may beperformed byhand or by the use of separate mechanical devices operatedby hand or by the use of machinery especially designed for carrying outmy improved process. A machine of this type isillustrated and describedin an application for Letters Patent of the United States filed by me onor about November 4, 1913, Serial No. 799221, but as before stated, myimproved process is capable of being carried out by other and differentmeans than those therein shown. lt'is'also to be understood that thematerials employed in the manufacture of the envelop, and which areadvanced during the various steps of the process from one stage oroperation to another, may be advanced continuously or intermittently aspreferred.

In the accompanying drawings which enlarged top plan view of portions ofthe en velop blank strip and transparent strip illustrating the varioussteps of my improved process to and including the forma- Patentedetpr.f3, 1915.

tion of the complete envelop. Fig. 2' is a front view of the completedenvelop. Fig. 2 is a plan view of one complete envelop as it wou1dappear if it were opened out and hid upon a flat surface. Fig. 3 isaview similar to Fig. 2 showing a slightly modified form of blank stripand illustrating the steps of my improved process carried out for themanufacture of an envelop slightly dif' fering from the envelop shown inFigs. 2,

2 and 2. Fig. 3 is a front view of the completed envelop shown in Fig.3. Fig. 3 is a plan view of the envelop shown in Fig. 3

opened out flat. Fig. 4: is a view similar to.

Figs. 2 and 3 showing an envelop blank strip similar to that shown inFig. 2 in the diderent stages, illustrating the steps of my improvedprocess, the window aperture and the transparent covering'therefor beingin this case omitted. Fig. 4: is a front View of the completed envelopillustrated in Fig. 4;

I will first describe my complete rocess in its preferred form for themanu acture.-' of an envelop having a window aperture and a covering oftransparent material therefor,

as illustrated in Figs. 1, 2, 2, and 2 of the accompanying drawings.

The envelop itself is not of my invention, but in order that the varioussteps of my improved process may be more clearly understood, T willfirst describe the. envelop which is to be produced thereby, specialreference being had to Figs. 2 and 2 The envelop comprises a rectangularfront portion 10", a rectangular back portion 1.0, of

the same s ze as the front portion and integrally connected therewith,the line of.

fold being indicated at 1. The back portion '10 has connected therewitha longitudinally extending sealing flap 10, the line of fold betweensaid flap and the part 10 being in- 'dicated at 2. The front of theenvelop 15 mg provided at each end with an end sea flap. 10 integraltherewith, the lines of fold bemg indicated at 3,3. The form of thisenvelop is such that it can be economically cut from a strip or blankhaving a width equal to the combined widths of'the' front, back, andsealing flap aswillhereinafter more fully appear. In its preferred form,the front of the envelop is provided with a window aperture 10. whichmay be of anyv desired shape and with a strip of transparas shown, andis gummed or adhesively secured thereto, the said transparent stripbeing slightly wider than the window aperture-10'. In the preferred formof the en velop, the transparent strip 11 is provided 'in those portionswhich lie upon and are secured to the end sealing flaps 10, withapertures-11 The envelop is-completed by folding the back and frontportions together .at fold l,folding the end flap portions 10 on thelines 3, over upon the back 10 together with the end portions of thetransparent strip, and sealing the same upon the back of the envelop,whereby the end portions of the trans arent striflp are interlocked withthe en sealing aps and the said sealing flaps are sealed through theapertures 11 upon the'back 10, thus further locking the ends of thetransparent strip and securing a better adhesion between the end sealingflaps and the back of the en velop. The sealing flap 10 is folded on theline 2 over upon the front of the envelop, as best shown in Fig. 2. Thissealing flap is providedwith a gummed portion as indicated, and thefront 10 of the envelop is provided with a locking aperture 10 in suchposition that the sealing flap will seal through said aperture upon theinclosure which carries the address to be viewed'through the windowaperture, and hold the address carrying portion thereof against movementin the envelop, and also close to the inner surface of the frontoftheenvelop, thus facilitating .the reading of the address through thetransparent strip; The back of the envelop is also preferably providedwith an aperture 10 for the insert on of a knife or letter opener, orother instrument to facilitate the opening of the envelop after it issealed.

In carrying out my invention I prefer to form the body of the envelop asbefore stated from a continuous strip of paper or other suitablematerial which I term the envelop blank strip,and which is indicated at10 Figs. 1 and 2, a roll of this paper being indicated at 10. Incarrying out my process continuously, this strip 10 is provided with thewindow apertures 10, .at suitable intervals so that they sition withrespect to the individual envelops when severed, and the envelop blankstrip is also provided with a band of gum indicated at 4 which extendslongitudinally of the blank adjacent to and between the 'window'apertures and being of a width %ghtly greater than said apertures. I mayH st form the apertures and then coat the strip with the band 4: of gum,or I may apply the gum by means of a suitable reciprooccupy the properpoeating or rotary die rbll, or by hand, learing ungummed portionssubstantially corresponding to the size of the window apertures andthereafter cut out the ungummcd portions.

The window apertures may be cut out by hand operated dies or otherwise,as preferred, and the envelop blank strip may be moved forward duringthe formation of the envelop either continuously or intermittently. Ialso provide the envelop blank strip with gum at those portionsindicated at 5 in Figs. 1 and 2 which are to form the sealing flaps. Iprefer to apply the gum at separated portions 5 instead of as a straightband as it facilitates cutting out the intermediate portions of theblank without fouling the cutting mechanism, which will be readilyunderstood. The gum used for the sealing flap will be of a characterusually employed for this purpose and I prefer to use a different kindof gum for the band 4, which is specially adapted to adhere to thetransparent strip and secure it to the body of the envelop,

The transparent strip 11 is preferably drawn from a supply roll 11 andis fed either by hand or by" suitable mechanical means to andsimultaneously applied to the gummed band 4 of the envelop blank stripso that the transparent paper is applied progressively from one end ofthe blank or blank strip to the other, and firmly sealed thereto overthe window aperture or apertures thereof;

I prefer to provide the transparent strip .with a looped portion 11* toaccommodate the line, the preferred location of which is indicated at 32in Fig. 1, for holding the transparent strip taut before it passes toand is placed in contact with the gummed portion of the envelop blankstrip.

I may in some instances completely form the envelop blank in the shapeshown in Fig. 2 and apply the transparent continuous strip from one endof the same to the other and then sever the strip after it has beenapplied, or I may in some instances apply the continuous transparentstrip to a plurality of envelop blanks of substantially the formshown'in Fig; 2 the strip continuing from one blank to another andthereafter severing the transparent strip to separate said blanks,

but I prefer in most instances to apply the strip continuously to acontinuous envelop blank strip, as shown in Figs. 1 and 2, and i tilltill

at such portions thereof as will fall upon and be applied to the endflap portions ofthe envelop blank or envelop blank strip. The strip 11ma be perforated at the time immediately efore its application to theenvelop blank strip, or it may be previously perforated and rolled upinto the roll 11 as preferred. ll prefer, however, to perforate it Iimmediately before it is applied to the envelop blank strip. llt is alsoto be understood that While ll prefer to apply gum-for the transparentstrip to the envelop blank Which has more body and is less liable tocurl and become distorted, I may in some instances apply the gum to thetransparent strip and then apply the gummed trans parent strip to theenvelop blank or envelop blank strip, this being within the scope of myinvention.

The transparent strip having been applied to the envelop blank strip,thenext step of my process consists in partially blanking the envelop,which is accomplished b cutting out transverse portions of the envelopblank strip as indicated at 6 and 6 without entirely severing the strip.The cut-out portions 6 terminate at their inner extremity in a ll-shapednotchfi which with the cut-out portions 6 also ll-shaped, define theends of adjacent end flaps of two adjoining blanks and the cut-outportions 6 "at their outer extremity increase in width as indicated at6,

thereby defining the end portions of adjacent sealing flaps. I alsoprovide the envelop blank strip with the perforations or apertures 10and 10 before referred to at the proper points. ll now apply to thetransverse portions of the envelop blank strip in line with the cut-outportions 6 and 6, and which are to form the end flaps of adjoiningenvelope, a coating of applied in any suitable manner, as indicated at 7in Figs. 1 and if, and it will be noted that this gum is apphed toportions of the envelop blank strip, and portions of the transparentstrip lying upon the same and throu h the apertures ll upon the portionsof t e envelop blank strip beneath. The envelop blank strip is thengiven a preliminar or first fold, the semi-detached portion 0 theenvelop blank strip forming the back and sealing flap of the envelop,ing folded on the line 1. over upon the integral portion of the strip sothat the gummed face ofthe sealing flap will face downwardly and thesealing flap will extend beyond theedge of r the integral portion of theenvelop blank.

strip as clearly shown in Figs. 1 and 2. .rl

- prefer to apply the gum to the sealing flap portions ofthe envelopblank strip at such time that it will be dry when fold just described ismade. so that it will no longer be sticky. The individual envelope arenow separated from the envelop blank strip by severing the envelop blankstrip and. the

transparent strip transversely and centrally of the transversely gummedportions 7, as indicated at the'right in Figs. 1 and 2, and

the envelop is completed by folding over the either by hand or bysuitable feed rollers, or other mechanical means and operated uponprogressively, in the manner indicated in the drawings. In my companionapplication hereinbefore referred to, which shows and describes amachine for carrying out my improved proc-ess, one form of mechanism foradvancing the envelop blank strip and the transparent stripintermittently is shown and described. In Fig. l of the drawings, I haveindicated certain mechanical instrumentalities which can be convenientlyemployed if desired in carrying out my improved process.

For example,-53 represents a die roll having cutaway portions, 53substantially correspondingto the size and shaperof the WlIldOWapertures which may be conveniently employed for applying the band ofgum to the continuous envelop blank strip, leaving the nngummed portionsto be subsequently cut out, as before described, and 54 represents-agumming die roll provided at its periphery gummed portion of the sealingflap for applyingthe gum for that purpose to the ap propriate portion ofthe envelop blank strip. 1 have also indicated in Fig. l certain instru-,mentalities which may be conveniently employed for advancing theenvelop blank strip.

and Withdrawing it from its roll. Thus ll and 15 represent feed rollersfor positively withdrawing the strip from the roll after which it ispreferably allowed to form a looporslack portion 10*; I prefer to employa tension device (for example, a device which will deflect the paper outof a straight line and as indicated at 31) for applying'a de sireddegree of tension or friction to the I strip which then passes over animpression roll 36 beneath the gumming die rolls before described, afterwhich the strip passes between the impelling rolls 80 and 81", forexample, which may be employed tov advance the paper and simultaneouslyroll down the transparent strip and 140 and 14:1 represent otherimpelling rollers co-acting with corresponding lower rollers indicated1n dot- 105v with die portions corresponding to the ted lines andengaging the partially folded strip-at different points transversely andlongitudinally, each of said rollers 14:0 and 141 being provided with anotch 140 and 141 respectively so located as to bridge over thetransversely gummed portions while advancing the strip and positivelycontrolling it up to the point where it is severed. It will thus be seenthat when devices of this character are employed the envelop blank stripwill be impelled or advanced by devices acting upon it at differentpoints and moving it forward against the tension device the preferredlocation of which is indicated at 31 the resistance of which remainsconstant and the stripadvancing devices are relieved fromthe drag "ofthe paper roll. Such devices I prefer to employ in carrying out myprocess by mechanical means as shown in my companion application, but asbefore stated,

I do not limit myself to the use of these or any other mechanicaldevices as the entire process may be carried out by hand or by handsupplemented by the use of simple hand tools, such as shears, or handknife and paste brush, as will be readily understood.

In Figs. 3, 3 ,.and .3 I have shown a slight modification of my processwhich consists merely in transferring the sealing flap from the back ofthe envelop to the front portion thereof so that when it is folded, itis folded over upon the back of the envelop instead of upon the front ofthe envelop. The process is exactlythe same as that heretofore describedwith this single exception,

and the parts of the envelop blank strip, the

transparent strip, and the envelop itself have been lettered identicallywith the corresponding parts shown in Figs. 1 and 2, and the sealingflap is lettered 10 in order to avoid confusion,as they are otherwiseidentical with. the parts shown in these figures.

Figs. 4 and 4 represent the application of my improved process for themanufacture of an envelop not provided with a window .aperture or thetransparent strip coverin the same, the envelop blank alone being actedupon in the manner heretofore described withreference'to Figs. v1 and 2,except that the application of a gummed band across the envelop, theperforation of window apertures, and. the application of the transparentstrip are dispensed with. As shown in these figures the envelop blankstrip is partially blanked by removing transversely disposed portions 6,and defining the end flaps, as indicated at 6*, 6-, and the. sealingflap as indicated at 6, all exactly as heretofore described withreference to Figs. 1 and 2. The envelop blank strip is also preferablyprovided witha perforation 10 to enable the pointvof a knife, letteropener,.paper cutter, or other tool to be inserted therein forfacilitating the opening of the envelop. 'The transverse portions 7 inline'with the cut-out gnaweportions are gummed as before described, theback portion of the envelop 10 is folded over upon the integral portionof the envelop blank strip as before described, and the envelop blankstrip is severed transversely of the gummed portions 7 after which theend flaps 10 are folded over and sealed upon -the back 10, and thesealing flap 10 is folded and creased, thus completin the envelop, whichis exactly like the enve op shown in Figs. 2 and 2", except for theaperture and the transparent paper covering for same.

It will also be obvious that in making the envelop without the windowaperture as shown in Figs. 4 and 4 the sealing flap may be formed eitheron the portion of the envelop blank strip forming the back of theenvelop as shown, or upon the portion of the envelop forming the front,as shown at 10" in Fig. 3, without departing from my invention.

What I claim and desire to secure by Letters Patent is 1. The hereindescribed process for the manufacture of envelops, having a windowaperture and a covering of transparent material therefor, which consistsin supporting a blank provided with a window aperture, applyingadhesix'e material to a portion of said blank of less width than saidblank, and including the edges of said aperture and the portions of theblank which are to form the end sealing flaps of the envelop andapplying a transparent strip of less width than said blank upon thegummed por- 10a tions thereof, whereby when the end flaps of the envelopare folded and sealed, portions of the transparent strip will beinterfolded' therewith.

2. The herein described process for the manufacture-of envelops having awindow aperture, and a covering of transparent material therefor, whichconsists in forming a blank-with a window aperture in that portion whichis to form the front body portion of the envelop, adhesiv'ely applying aportion of a continuous transparent strip of less width than the blankthereupon and over said window aperture, without severing said tranarentstrip, severing said transparent stri after the applied portion hasbeen'adhesively attached to the body portion of the envelop, and foldingother portions of'the blank over upon'the portion having the transparentstrip secured thereto.

3. The herein described process for the manufacture of envelops having awindow aperture and a covering of transparent material therefor, whichconsists in feeding an envelop blank provided with a window aperture,applying gum to a narrow portion of the envelop blank extendinglongitudinally thereof, around the edges of the window aperture and uponportions of the blank which are to form the end flaps of the nielegreeenvelop, and feeding a transparent strip of less width than said blankand applying the same progressively to the gummed portions thereoflongitudinally of the blank, over the window opening and upon said endflap portions, whereby when the end flaps are folded, portions of thetransparent strip will be folded therewith.

4.. The herein described process for the manufacture of envelops havinga window aperture and a covering of transparent material therefor, whichconsists in feeding a continuous envelop blank strip, form-ingaddressviewing window apertures therein at intervals, adhesively applying acontinuous strip of transparent material of less width than the blankstrip to the blank strip progressively, over said window apertures, andsevering" said transparent strip, blanking the envelop blank strip todefine. the body portions, end flaps, andsealing flap, and folding said.body portions together severing the individual envelop blanks from theblank strip, and sealing the end flaps.

5. The herein described process for the manufacture of envelops having awindow aperture and a covering of transparent material therefor, whichconsists in feeding a plurality of contiguous envelop blanks end to end,provided each with a window aperturedisposed longitudinally with respectto the line of feed, applying gum to narrow portions of the envelopblanks successively adjacent to the edges of the window apertures andupon portions between the apertures of adjacent envelop blanks which areto form the end sealing flaps of the envelops, applying a continuoustransparent strip of less transverse width than the envelop blank to thegummed portions of said envelop blanks whereby when the end flaps of theenvelop are folded, portions of the transparent strip will beinterfolded therewith, and severing said transparent strip.betweenadjacent envelop blanks.

6. The herein described process for the manufacture of envelops, havinga window aperture, and a covering of transparent material therefor,which consists in supporting a blank provided with a window aperture,applying adhesive material to. a portion of said blank of less widththan said blank, and including the edges of said aperture and theportions of the blank which are to form the end sealing flaps of theenvelop, and applyin a. transparent strip of less width than said blankupon gummed portions thereof,

and subsequently applying gum to the portions ofsaid transparent striplying upon the end flap forming portions of the envelop blank. I

7. The herein described process for the manufacture of envelops, havinga window aperture, and a covering of transparent ma terial therefor,which consists in supporting plying a transparent strip of less width.

than said blank upon gummed portions thereof, and subsequently sealingthe end flap forming portions and the portions of the transparent stripadhering thereto, upon other portions of the envelop blank.

8. The herein described process for the manufacture of envelops, havinga window aperture, and a covering of transparent Inaterial therefor,which consists in supporting a blank provided with a window aperture,ap-

plying adhesive material to a portion of said blank of less width thansaid blank, and including the edges of said aperture and the portions ofthe blank which are to form the end sealing flaps of the envelop, andapplying a transparent strip of less width than said blank upon gummedportions thereof, and subsequently applying gum in lines eX- tendingtransversely of the blank, upon said end flap forming portions and uponthe portions of the transparent strip lying upon said end flap formingportions.

9. The herein described process for the manufacture of envelops having awindow aperture and a covering of transparent material therefor, whichconsists in feeding a plurality of contiguous envelop blanks end to end,provided each with a window aperture disposed longitudinally withrespect to the line of feed, applying gum to narrow portions of theenvelop blanks successively adjacent to the edges of the Windowapertures, and upon portions between the apertures of adjacent envelopblanks, which are to form the end sealing flaps of the envelops,applying a continuous transparent strip of less transverse width thanthe envelop blank to the gummed portions of said envelop blanks,applying adhesive material to the portions of said transparent stripadhering to the said end flap forming portions, and severing saidtransparent strip between adjacent envelop blanks, whereby when the endflaps of the envelop blanks are folded, portions of the transparentstrip will be interfolded therewith, and sealed upon other portions ofthe envelop.

l0. lhe herein described process for the manufacture of envelope havinga window aperture and a covering of transparent material therefor, whichconsists in feeding a plurality of contiguous envelop blanks end to end,provided each with a window aperture disposed longitudinally withrespect to the line of feed, applying gum to narrow portions of theenvelop blanks successively adjacent to the edges of the windowapertures, and upon portions between the apertures of adjacent envelopblanks, which are to form the end sealing flaps of the envelops applyinga continuous transparent strip of less transverse width than the envelopblank to the gummed portions of said envelop blanks, and severing saidtransparent strip between adjacent envelop blanks, and sealing the endflap forming portions of the envelop and 'the adhering portions of thetransparent strip over upon the other portions of the envelop blank.

11. The herein described process for the manufacture of envelops havinga window aperture and a covering of transparent inaterial therefor,which consists in feeding a plurality of contiguous envelop blanks endto end, provided each with a window aperture disposed longitudinallywith respect to the ,line of feed, applying gum to narrow portions, ofthe envelop. blanks successively adjacent to the edgesof the windowapertures and upon portions between the apertures of adjacent envelopblanks, which are to form the end sealing flaps of the envelops,

applying a continuous transparent strip of less transverse width thanthe envelop blank to the gunimed portions of said envelop blanks,applying adhesive material in lines extending transversely of theenvelop blank upon the end flap forming portions, and the portions ofthe transparent strip adhering thereto, and severing said transparentstrip between adjacent blanks, whereby when the end flap formingportions are folded and 85 sealed, portions of the transparent stripwill be interfolded therewith and sealed upon other portions of theenvelop blank.

12. The herein described process for the manufacture of envelops havinga trans- 4 parent window portion in one wall, which consists in feedinga continuous envelop blank strip, providing said strip with transparentwindow portions at intervals therein, cutting out'transverse portions ofthe envelop blank strip in line with portions between adjacent windowportions, to form semi-detached portions at one side of the blank stripof a size sufficient for one complete wall of the envelop, and definingend flap portions of adjacent envelop blanks, without severing thestrip, folding said semidetached portions over upon the integral 7portions of the envelop blank strip, severing the individual envelopblanks centrally through said defined end fiap portions, and

' sealing the end flap portions at each end of the envelop over uponsaid semi-detached portions.

13. The herein described process for the manufacture of envelops havinga trans- .parent window portion in one wall, which consists in feeding acontinuous envelop blank strip, providing said strip with transparentvwindow portions at intervals therein,

3 cutting out transverse portions of the envelop blank strip in linewith portions between adjacent window portions to form semi-detachedportions at one side of the blank strip of a size sufiicient for one complete .wall of the envelop, and defining end flap portions of adjacentenvelop blanks, without severing the strip, folding said semi-detachedportions over upon the integral portions of the envelop blank strip,guinlning the defined end flap portions, J1) severing the envelop blankstrip centrally of said defined end flap portions, and sealing saidgummed end flap portions at each end of the envelop over upon thesemi-detached ortions.

14. T e herein described process for the manufacture of envelops havinga window aperture and a covering of transparent material therefor, whichconsists in feeding a continuous envelop blank strip provided at 8intervals with window apertures, applying gum to said envelop blankstrip around the edges of said apertures, applying a transparent fabricof less width than the envelop blank strip to said gumnied portions, tocover the window apertures, partially blanking the strip by cutting outtransverse ortions and forming semi-detached portions between said outout portions at one side of the envelop blank strip, and defining theend flap portions of adjacent envelop blanks, without severing saidblank strip, folding the semi-detached portions over upon the integralportions of the envelop blank strip, severing the envelop blank stripsubstantially centrally through the defined adjacent end portions, andfolding and sealing the end flap portions at each end of the envelopblanks over upon the said semi-detached portions.

15. The herein described process for the manufacture of envelops havinga window aperture and a covering of transparent material therefor, whichconsists in feeding a continuous envelop blank strip provi ed withwindow apertures, applying a transparent strip of less width than theenvelopblank strip over said apertures, partially blanking the envelopblank strip withoutsevering it, gurnming certain portions of theartially blanked strip, folding the partially lanked strip, severing theblank strip into individual envelop blanks, and folding and sealingportions of the same to complete the envelop. V 120 16. The hereindescribed process for the manufacture of envelops having a windowaperture and a covering of transparent material therefor, which consistsin feeding an envelop blank strip provided with window apertures,applying gum to said blank strip around and between said apertures,applying a transparent strip of less width than the envelop blank stripto the gummed por- 1 tions of the blank strip, cutting away poriaearee Wtions-of the blank strip to define individual envelop blanks, andfolding, severing and sealing the individual envelop blanks.

17. The herein described process for the manufacture of envelops havinga window aperture and a coveringof transparent material therefor, whichconsists in feeding a continuous envelop blank strip, forming windowapertures therein at intervals extending longitudinally of the strip andlocated nearer one side of thestrip thanthe other, applying um to anarrow portion of theenvelop blan strip around and between the windowapertures therein, applying a strip of transparent material narrowerthan the envelop blank strip to the gummed portions thereof, cutting outportions of the envelop blank strip to partially blank the same withoutsevering it, folding portions of the partially blanked strip upon otherportions thereof without severing said strip, applying gum to portionsof the partially blanked strip, severing said partially blanked stripinto individual envelop blanks, and folding and sealing the lastmentioned gurnmed portions.

18. The herein described process for the manufacture of envelops havinga window aperture and a covering of transparent material therefor, whichconsists in providing a continuous envelop blank strip with windowapertures at intervals, adhesively, applying a continuous transparentstrip to the envelop blank strip progressively over the window aperturesthereof, partially sever a continuousenvelop blank strip with windowapertures at intervals, adhesively applying a continuous transparentstrip to said blank strip over the successive apertures therein,removing transversely, disposed portions ofthe said blank strip withoutsevering the strip to form semi-detached portions between[ successiveportions removed,

gurnming transverse portions of said blank strlp and'the portions of thetransparent strip adhering thereto, folding the semidetached portions ofthe blank strip over upon the integral ortion of the blank strip,

tit

severing the enve op blank strip and transparent str1p through I thetransversely gummed portions ofeach severed enveldp blank over upon thebody of the envelop.

20. The herein described process for the h manufacture of envelop havinga window aperture and a covering of transparent material therefor, whichoonsistsin providing a continuous envelop blank stri with windowapertures at intervals, ad esively applying a continuous transparentstrip to the said envelop blank strip over the sald'apertures thereof,cutting out transversely disposed portions of the strip to formsemidetaohed portions between. the cutout portions and to define the endflap portions and sealing flap portion of the envelop blank withoutsevering said blank strip, applying gum to transversely disposedportions of the envelop blank strip and adhering portions of the transarent strip, in line with said cut-out portions, foldin the saidsemi-detached portions of sai blank stri over upon the integralportionsof the blan strip, severing both of said strips through the saidtransversely gummed portions, foldin the transversely gummed endportions" of the severed envelop blanks upon the body of the envelop,and finally folding the sealing flap over upon the envelop body.

21. The herein described process for the manufacture of envelops havinga window aperture and a covering of transparent material therefor, whichconsists in prov1d ing a continuous envelop blank strip with Windowapertures at intervals, adhesively applying a continuoustransparentstrip to the envelop blank strip over said window apertures, providingsaid transparent strip with apertures in the portions thereof which lieupon the end flap portions of the envelop blank strip, cutting outtransverse portions of the envelop blank strip to form semr-detachedportions between said cut-outportions removed without severing saidstrip, applying adhesive to the transverse portlons-of the envelop blankstrip and the perforated portions of the transparent strip lyingthereon, folding the semi-detached portions of the envelop blank stripbetween said cut-out portion over upon the integral portions of theenvelop blank strip, severing the envelop blank strip through saidtransversely gummed portions, and folding the transversely gumined endflap portions over upon .the body of the envelop.

22. The herein described process for the manufacture of envelops whichconsists in cutting out transversely di osed portions of a continuousenvelop blan strip withoutey" completely severing said strip, to definethe body portions, and the end flaps and sealing flap gummingtransversely integral portions of the strip in line with the cutoutportions,

folding the semi-detached portions of said strip between successive outout portions 15 over upon the integrallportions before com V as r1,135,786

, pletely severing said strip, severing transversely the integraltransversely gummed portions of said strip between said foldedsemi-detached portions which transversely gummed portions form the endflaps of the envelop, and sealing the end flaps upon the body portionsof the envelop.

23. The herein described process for the ''manufacture of envelops whichconsists in fore severing the strip, severing the strip transverselysubstantially centrally of the transversely guinmed portions, andfolding I the gummed end flaps over upon one of the body portions of theenvelop.

24. The herein described process for the manufacture of envelops, whichconsists in v cutting out transverse portions of a continu 1 ous envelopblank strip at intervals Without severing said strip to formsemidetached portions of greater .Width than the remaining portion ofthe blank, folding said semidetached portions over upon the main blankso that the outer portions thereof will project beyond the edge of theintegral portions and form the sealing flap of the envelop,

severing the envelop blank strip through the transverse portions in linewith said cutout portions, folding and sealing the end flap portions soformed over upon the body of the envelop, and folding the sealing flapportion over'uponthe body of the envelop.

25; The herei11-described process for the manufacture of envelops, whichconsistsin cutting out transverse portions of a continuous blank stripat intervals, severing said strip to form semi-detached portions ofgreater width than the integral portions of the strip, applying gum totransverse portions of the strip in line with said cut-out portions,folding said semi-detached portions over upon the integral portions ofthe strip so that the outer end portions thereof will project beyond theedge of the integral portion of the strip to form the sealing flap,severing the said strip centrally through the transverse gummedportions, folding and sealing the transverse gummed portions at each endof the severed envelop blank over upon the body of the'envelop, andfolding said sealing flap longitudinally of the envelop upon the body ofthe same.

26. The herein described process for the manufacture of envelops havinga window aperture and a covering of transparent material therefor, whichconsists in feeding a continuous envelop blank strip, forming addressviewing window portions therein at intervals, adhesively applyin a piecof transparent material of less width than the said blank strip, uponthe same and over a window aperture therein, blanking the blank strip todefine the envelop body portions, end flaps, and sealing flap severingthe individual envelop blanks from the blank strip, and sealing the endflaps upon one of the body portions of the envelop. 27. The hereindescribed process of making envelops provided with window apertures, anda covering of transparent material therefor, which consists in feeding acontinuous blank strip provided with window apertures, adhesivelyapplying a continuous strip of transparent material of less width thanthe said blank strip to the same over the window apertures, andsubsequently blanking the envelop blank strip, to define the bodyportions, end flaps, and sealing flap of an envelop, one of the bodyportions of the envelop blank containing said window aperture.

In testimony whereof I aflix my signature, in the presence of twowitnesses.

NELSON n. FUNK.

' Witnesses:

W. H. Yarns, BERTHA B. ArrEL.

